What is the normal range for calcium in the blood?

The normal range for calcium in the blood typically falls between 2.1 and 2.6 mmol/L, with many laboratories considering 2.2 to 2.3 mmol/L as the standard reference range for adults. The choice indicating 2.1-2.2 mmol/L aligns closely with the lower end of this reference range, making it a reasonable indication of normal serum calcium levels.

Calcium is crucial for various physiological functions, including bone health, muscle contraction, nerve transmission, and blood clotting. Maintaining calcium levels within this normal range is essential for overall bodily function. If a patient's calcium level falls outside of this range, it may indicate a potential issue such as hypocalcemia or hypercalcemia, requiring further investigation and management.

While the range mentioned in your answer is the most commonly accepted, slight variations can occur between different labs. Understanding the range is fundamental for a practical nurse to assess and monitor patients effectively.